Electric gas spring supporting rod and automobile electric tail gate driver

Abstract

The utility model relates to the technical field of automobile parts, in particular to an electric gas spring supporting rod which comprises a gas spring assembly and a power assembly. A piston rod; the inner sleeve and the outer sleeve are arranged in a sliding and telescopic mode; the transmission sleeve is arranged in the outer sleeve, and threads are arranged on the outer wall of the transmission sleeve in the length direction of the transmission sleeve; the nut is in threaded transmission with the thread on the transmission sleeve, and the nut can slide in the length direction of the outer sleeve and is limited in the circumferential direction; the piston is arranged in the transmission sleeve in a sliding mode, and the piston rod extends into the transmission sleeve from the open end of the transmission sleeve and is connected with the piston; wherein one end, located in the outer sleeve, of the inner sleeve is connected with the nut, the power assembly is used for driving the transmission sleeve to rotate, and the transmission sleeve drives the inner sleeve and the piston rod to stretch out or retract from the outer sleeve according to the rotating direction.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to an electric gas spring support rod with damping and a driver for opening or closing a tailgate of an automobile. Background Art

[0002] The car strut is an indispensable part of the car. The stretching or contraction of the strut drives the opening or closing of the car tailgate (rear cover).

[0003] The core transmission actuator parts of the existing electric tailgate support rod are mainly: an outer guide tube, a wire sleeve and a screw rod. For example, the electric tailgate support rod of the automobile with the publication number CN109577781A, the core actuator of the support rod must be matched with a spring to be applied to the tailgate of the automobile. Since such electric tailgate support rod is provided with a spring, there is a possibility of the rod exploding, and the impact force generated by the rod exploding is as high as several KN, which is enough to threaten the life of people standing next to the tailgate. Utility Model Content

[0004] The main purpose of the utility model is to provide an electric gas spring support rod and an automobile electric tailgate driver, aiming to solve the problem of the existing electric tailgate support rod exploding.

[0005] In order to solve the above problems, on the one hand, the utility model proposes an electric gas spring strut, including a gas spring assembly and a power assembly, wherein the gas spring assembly includes:

[0006] Inner casing;

[0007] A piston rod is disposed in the inner sleeve, and one end of the piston rod is fixedly connected to the inner sleeve;

[0008] An outer sleeve is sleeved on the inner sleeve, and the inner sleeve and the outer sleeve are slidably and telescopically arranged;

[0009] A transmission sleeve is arranged in the outer sleeve, one end of the transmission sleeve is a closed end, the other end is an open end, and the outer wall of the transmission sleeve has a thread arranged along its length direction;

[0010] A nut, threadedly driven with the thread on the transmission sleeve, the nut can slide along the length direction of the outer sleeve and be limited in the circumferential direction;

[0011] and a piston, slidably disposed in the transmission sleeve, wherein the piston rod extends from the open end of the transmission sleeve and is connected to the piston;

[0012] Among them, one end of the inner sleeve located in the outer sleeve is connected to the nut, and the power component is used to drive the transmission sleeve to rotate. The transmission sleeve drives the inner sleeve and the piston rod to extend or retract from the outer sleeve according to the direction of rotation.

[0013] In one embodiment, the outer sleeve has a first chamber and a second chamber along its length direction;

[0014] Wherein, the power assembly is arranged in the first chamber, and the transmission sleeve is arranged in the second chamber.

[0015] In one embodiment, the gas spring assembly further comprises:

[0016] A first ball joint, disposed on the outer sleeve, closing an outer port of the first chamber;

[0017] and a second ball and socket joint, the inner sleeve and the piston rod are connected via the second ball and socket joint, and the second ball and socket joint closes the outer end of the inner sleeve.

[0018] In one embodiment, a detachable protective liner sleeve is disposed in the first chamber of the outer sleeve, the power assembly is disposed in the protective liner sleeve, and the protective liner sleeve is connected to the first ball joint.

[0019] In one embodiment, the power assembly comprises:

[0020] A motor is disposed in the protective liner sleeve;

[0021] and a reduction box, which is arranged in the protective liner sleeve and connected to the motor;

[0022] Wherein, the closed end of the transmission sleeve is provided with a connecting shaft extending outward, and the connecting shaft is connected to the output end of the reduction box.

[0023] In one embodiment, the power assembly further comprises:

[0024] The damper is arranged between the reduction box and the connecting shaft.

[0025] In one embodiment, the gas spring assembly further comprises:

[0026] The sealing sleeve is arranged at the outer port of the second chamber of the outer sleeve to achieve sliding sealing between the inner sleeve and the outer sleeve.

[0027] On the other hand, the utility model also provides an electric tailgate driver for an automobile, comprising the electric gas spring strut as described above.

[0028] Beneficial effects: The utility model utilizes the principle of ball screw transmission, and drives the transmission sleeve to rotate through the power assembly. The rotation of the transmission sleeve will drive the nut on it to do linear motion. Since the inner sleeve is fixedly connected to the nut, the inner sleeve is also driven to do linear motion synchronously, thereby making the inner sleeve and the piston rod do telescopic motion on the outer sleeve. When the piston rod moves, the piston on it moves in the transmission sleeve and compresses the air. One end of the piston rod is connected to the tailgate of the car, and one end of the outer sleeve is connected to the rear of the car, so that the function of manually / automatically opening or closing the tailgate of the car can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0031] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0032] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0033] Figure 4 yes Figure 2 The enlarged view of point B in the middle;

[0034] Figure 5 This is a schematic diagram of the structure of the utility model after the outer sleeve is removed;

[0035] Figure 6 It is a schematic diagram of the structure of the utility model after removing the outer sleeve and the protective lining sleeve.

[0036] The following are the descriptions of the reference numerals:

[0037] 100, gas spring assembly; 110, inner sleeve; 120, piston rod; 130, outer sleeve; 131, first chamber; 132, second chamber; 133, protective liner sleeve; 140, transmission sleeve; 141, connecting shaft; 150, nut; 160, piston; 170, first ball joint; 180, second ball joint; 190, sealing sleeve; 200, power assembly; 210, motor; 220, reduction gearbox; 230, damper. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0042] The utility model proposes an electric tailgate driver for automobiles, which is mainly composed of an electric gas spring strut and a control unit. The strut is controlled by the control unit to extend and retract. The strut is mainly composed of a gas spring assembly and a motor. The power of the motor can drive the nut of the gas spring outer sleeve to move, thereby realizing the contraction function of the strut. The electric gas spring strut will not explode as may occur when using the original spring. The overall structure is simple and the safety system is higher.

[0043] Gas spring is an industrial accessory that can support, buffer, brake, adjust height and adjust angle. It consists of the following parts: pressure cylinder, piston rod, piston, sealing guide sleeve, filler (inert gas or oil-gas mixture), as well as control elements in the cylinder and control elements outside the cylinder (referring to controllable gas spring) and joints. The principle is to fill the closed pressure cylinder with inert gas or oil-gas mixture, so that the pressure in the cavity is several times or dozens of times higher than the atmospheric pressure, and the pressure difference generated by the cross-sectional area of ​​the piston rod is smaller than the cross-sectional area of ​​the piston to achieve the movement of the piston rod. Due to the fundamental difference in principle, gas springs have significant advantages over ordinary springs: relatively slow speed, small change in dynamic force (generally within 1:1.2), and easy control. Based on this, the gas spring structure is used to replace the spring and other components of the traditional electric strut.

[0044] The structure of the electric gas spring strut of the present application is described in detail through the following embodiments.

[0045] Embodiment 1:

[0046] like Figure 1-Figure 6 As shown, in this embodiment, the electric gas spring strut includes a gas spring assembly 100 and a power assembly 200, wherein the gas spring assembly 100 includes: an inner sleeve 110; a piston rod 120, which is arranged in the inner sleeve 110 and one end of which is fixedly connected to the inner sleeve 110; an outer sleeve 130, which is sleeved on the inner sleeve 110, and the inner sleeve 110 and the outer sleeve 130 are slidably and telescopically arranged; a sleeve, which is arranged in the outer sleeve 130, one end of the transmission sleeve 140 is a closed end, and the other end is an open end, and the outer wall of the transmission sleeve 140 has a thread arranged along its length direction; a nut 150, which is threadedly driven with the thread on the transmission sleeve 140, and the nut 150 can slide along the length direction of the outer sleeve 130 and is limited in the circumferential direction; and a piston 160, which is slidably arranged in the transmission sleeve 140, and the piston rod 120 extends from the open end of the transmission sleeve 140 and is connected to the piston 160;

[0047] Among them, one end of the inner sleeve 110 located in the outer sleeve 130 is connected to the nut 150, and the power component 200 is used to drive the transmission sleeve 140 to rotate. The transmission sleeve 140 drives the inner sleeve 110 and the piston rod 120 to extend or retract from the outer sleeve 130 according to the direction of rotation.

[0048] In this technical solution, the principle of ball screw transmission is utilized, and the transmission sleeve 140 is driven to rotate by the power assembly 200. The rotation of the transmission sleeve 140 will drive the nut 150 thereon to do linear motion. Since the inner sleeve 110 is fixedly connected to the nut 150, the inner sleeve 110 is also driven to do linear motion synchronously, thereby making the inner sleeve 110 and the piston rod 120 do telescopic motion on the outer sleeve 130. When the piston rod 120 moves, the piston 160 thereon moves in the transmission sleeve 140 and compresses the air. One end of the piston rod 120 is connected to the tailgate of the car, and one end of the outer sleeve 130 is connected to the rear of the car, so that the function of manually / automatically opening or closing the tailgate of the car can be realized.

[0049] In this embodiment, the outer sleeve 130 is optimized to have a first chamber 131 and a second chamber 132 along its length direction; wherein the power assembly 200 is disposed in the first chamber 131, and the transmission sleeve 140 is disposed in the second chamber 132. Such a configuration facilitates the installation of each structure.

[0050] In this embodiment, specifically, the gas spring assembly 100 further includes: a first ball joint 170, which is disposed on the outer sleeve 130 and seals the outer port of the first chamber 131; and a second ball joint 180, through which the inner sleeve 110 and the piston rod 120 are connected, and the second ball joint 180 seals the outer port of the inner sleeve 110. By providing the first ball joint 170 and the second ball joint 180, the universal connection of the entire electric gas spring strut with the tailgate and the rear of the car is facilitated.

[0051] Furthermore, the connecting ends of the first ball joint 170 and the second ball joint 180 are provided with threaded sections, and both are fixed to the outer sleeve 130 and the inner sleeve 110 by means of threaded connection.

[0052] In this embodiment, the gas spring assembly 100 is optimized and further includes: a sealing sleeve 190, which is disposed at the outer port of the second chamber 132 of the outer sleeve 130, so that a sliding seal is formed between the inner sleeve 110 and the outer sleeve 130. The sealing sleeve 190 is provided so that a sliding seal is formed between the inner sleeve 110 and the outer sleeve 130.

[0053] Embodiment 2:

[0054] This embodiment is a further improvement made on the basis of the first embodiment.

[0055] In this embodiment, if Figure 2 , Figure 4-Figure 6As shown, a detachable protective liner sleeve 133 is disposed in the first chamber 131 of the outer sleeve 130 , the power assembly 200 is disposed in the protective liner sleeve 133 , and the protective liner sleeve 133 is connected to the first ball joint 170 .

[0056] In the present technical solution, in order to facilitate the installation and maintenance of the power component 200, a protective liner sleeve 133 is provided. During installation, the power component 200 is first installed in the protective liner sleeve 133, and then the end of the protective liner sleeve 133 is connected to the first ball joint 170 (which can be fixed by screws), and then the protective liner sleeve 133 and the power component 200 are inserted into the first chamber 131 of the outer sleeve 130, and finally the first ball joint 170 is tightened on the outer sleeve 130. It is very convenient. During maintenance, it is only necessary to unscrew the first ball joint 170 outward, and then apply a pulling force outward to pull out the entire protective liner sleeve 133, and then the power component 200 can be inspected and repaired.

[0057] Embodiment three:

[0058] This embodiment is a further improvement made on the basis of the first and second embodiments.

[0059] In this embodiment, if Figure 2 , Figure 4 and Figure 6 As shown, the power assembly 200 includes: a motor 210, which is disposed in the protective liner sleeve 133; a reduction box 220, which is disposed in the protective liner sleeve 133 and connected to the motor 210; a damper 230, which is connected to the reduction box 220;

[0060] The closed end of the transmission sleeve 140 has a connecting shaft 141 extending outward, and the connecting shaft 141 is connected to the damper 230 .

[0061] In the present technical solution, the transmission sleeve 140 is driven to rotate by the motor 210, thereby realizing the extension and retraction of the support rod. Specifically, after the motor 210 rotates, it is first decelerated by the reduction gear box 220 so that the transmission sleeve 140 can rotate at a low speed, so that the tailgate of the car can rise or fall slowly. In order to ensure the stability of the support rod when extending and retracting, a damper 230 is also provided.

[0062] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. An electric gas spring strut, comprising a gas spring assembly (100) and a power assembly (200), characterized in that: The gas spring assembly (100) comprises: Inner sleeve (110); A piston rod (120) is disposed in the inner sleeve (110), and one end of the piston rod is fixedly connected to the inner sleeve (110); An outer sleeve (130) is sleeved on the inner sleeve (110), and the inner sleeve (110) and the outer sleeve (130) are slidably and telescopically arranged. A transmission sleeve (140) is arranged in the outer sleeve (130), one end of the transmission sleeve (140) is a closed end, and the other end is an open end, and the outer wall of the transmission sleeve (140) has a thread arranged along its length direction; A nut (150) is threadedly driven with a thread on the transmission sleeve (140), and the nut (150) can slide along the length direction of the outer sleeve (130) and is limited in the circumferential direction; and a piston (160) slidably disposed in the transmission sleeve (140), wherein the piston rod (120) extends from the open end of the transmission sleeve (140) and is connected to the piston (160); One end of the inner sleeve (110) located inside the outer sleeve (130) is connected to the nut (150), and the power assembly (200) is used to drive the transmission sleeve (140) to rotate. The transmission sleeve (140) drives the inner sleeve (110) and the piston rod (120) to extend or retract from the outer sleeve (130) according to the direction of rotation.

2. An electric gas spring strut as claimed in claim 1, characterized in that: The outer sleeve (130) has a first chamber (131) and a second chamber (132) along its length direction; Wherein, the power assembly (200) is arranged in the first chamber (131), and the transmission sleeve (140) is arranged in the second chamber (132).

3. An electric gas spring strut as claimed in claim 2, characterized in that: The gas spring assembly (100) further comprises: A first ball joint (170) is disposed on the outer sleeve (130) and closes the outer port of the first chamber (131); and a second ball joint (180), the inner sleeve (110) and the piston rod (120) are connected via the second ball joint (180), and the second ball joint (180) closes the outer end of the inner sleeve (110).

4. An electric gas spring strut as claimed in claim 3, characterized in that: A detachable protective liner sleeve (133) is arranged in the first chamber (131) of the outer sleeve (130), the power assembly (200) is arranged in the protective liner sleeve (133), and the protective liner sleeve (133) is connected to the first ball joint (170).

5. An electric gas spring strut as claimed in claim 4, characterized in that: The power assembly (200) comprises: A motor (210) is disposed in the protective lining sleeve (133); and a reduction box (220), which is disposed in the protective lining sleeve (133) and connected to the motor (210); The closed end of the transmission sleeve (140) is provided with a connecting shaft (141) extending outward, and the connecting shaft (141) is connected to the output end of the reduction box (220).

6. An electric gas spring strut as claimed in claim 5, characterized in that: The power assembly (200) further comprises: The damper (230) is arranged between the reduction box (220) and the connecting shaft (141).

7. An electric gas spring strut as claimed in claim 2, characterized in that: The gas spring assembly (100) further comprises: The sealing sleeve (190) is arranged at the outer port of the second chamber (132) of the outer sleeve (130) so as to form a sliding seal between the inner sleeve (110) and the outer sleeve (130).

8. An electric tailgate driver for an automobile, characterized in that: Comprising an electric gas spring strut as described in any one of claims 1-7.

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